11666662575 has 12 divisors (see below), whose sum is σ = 19288882248. Its totient is φ = 6222220000.

The previous prime is 11666662541. The next prime is 11666662589. The reversal of 11666662575 is 57526666611.

It is not a de Polignac number, because 11666662575 - 2¹¹ = 11666660527 is a prime.

It is a super-2 number, since 2×11666662575² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77777676 + ... + 77777825.

It is an arithmetic number, because the mean of its divisors is an integer number (1607406854).

Almost surely, 2^11666662575 is an apocalyptic number.

11666662575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11666662575 is a deficient number, since it is larger than the sum of its proper divisors (7622219673).

11666662575 is a wasteful number, since it uses less digits than its factorization.

11666662575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155555514 (or 155555509 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 11666662575 in words is "eleven billion, six hundred sixty-six million, six hundred sixty-two thousand, five hundred seventy-five".